Diff: main.cpp

Revision:

0:fd564dc0cd83

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Feb 12 22:20:56 2014 +0000
@@ -0,0 +1,73 @@
+#include "mbed.h"
+#include "SLCD.h"
+#include "TSISensor.h"
+
+#define CHART_SIZE 64
+
+Ticker timer;
+AnalogOut vout(PTE30);
+SLCD slcd;
+TSISensor tsi;
+InterruptIn amp_up(SW1);
+InterruptIn amp_down(SW3);
+
+float amplitude = 0;
+float freq = 20;
+static int phase = 0;
+static float sinwave[CHART_SIZE] = {
+    0.5000,0.5490,0.5975,0.6451,0.6913,0.7357,0.7778,0.8172,0.8536,0.8865,
+    0.9157,0.9410,0.9619,0.9785,0.9904,0.9976,1.0000,0.9976,0.9904,0.9785,
+    0.9619,0.9410,0.9157,0.8865,0.8536,0.8172,0.7778,0.7357,0.6913,0.6451,
+    0.5975,0.5490,0.5000,0.4510,0.4025,0.3549,0.3087,0.2643,0.2222,0.1828,
+    0.1464,0.1135,0.0843,0.0590,0.0381,0.0215,0.0096,0.0024,0.0000,0.0024,
+    0.0096,0.0215,0.0381,0.0590,0.0843,0.1135,0.1464,0.1828,0.2222,0.2643,
+    0.3087,0.3549,0.4025,0.4510};
+void timer_int();
+void display(float val);
+void amp_up_int();
+void amp_down_int();
+
+
+void timer_int(){
+    phase++;
+    if(phase >= CHART_SIZE)
+        phase = 0;
+    vout = amplitude*sinwave[phase];
+}
+
+void amp_up_int(){
+    if(amplitude <= 0.95){
+        amplitude += 0.05;
+        display(amplitude*3.3);
+    }
+}
+
+void amp_down_int(){
+    if(amplitude >= 0.05){
+        amplitude -= 0.05;
+        display(amplitude*3.3);
+    }   
+}
+
+void display(float val){
+    char buf[16];
+    int tmp = int(val*100);
+    sprintf(buf,"%d%d%d",tmp/100,(tmp%100)/10,tmp%10);
+    slcd.printf(buf);
+    slcd.Home();
+}
+
+int main(){
+    amp_up.rise(amp_up_int);
+    amp_down.rise(amp_down_int);
+    slcd.DP1(1);
+    display(amplitude*3.3);
+    timer.attach(&timer_int, 1/freq);
+    while(true){
+        if(tsi.readPercentage()!=0){
+            freq = 50 * tsi.readPercentage();
+            timer.attach(&timer_int, 1/freq);
+        }
+        wait(0.05);
+    } 
+}
\ No newline at end of file